This episode comes a long way from its comedic beginning, in which Rista leads Eruru and Mash on a shopping trip, she ends up sniping with a clothier about topless and bottomless swimsuits, then gets the idea to arrange an evening that will end with scoring with Seiya.
Things take a distinct turn when, upon returning to the palace at sundown, Seiya is nowhere to be found. No matter what reasons the three can come up with for his absence, and no longer how long they wait, Seiya…just doesn’t show up.
On the verge of panic, Rista visits Ishtar for guidance, where a tearful Ariadoa leads her, Eruru and Mash to a realm where time stands still. There, Ishtar informs them that Seiya has already headed to the Demon Lord to defeat him himself.
The reason Seiya has been so cold and distant to the three of them is that he actually cares for their well-being to the point he doesn’t want to put them in harm’s way. Since the Demon Lord now has a weapon that can destroy Rista’s soul, Seiya felt it best to keep her away from the battle.
Rista also wasn’t aware due to his Fake Out skill, but Seiya has been totally maxed out since the fight with the Dragons, and has been adding skills like Valkyrie’s Gate of Valhalla to make up for his stagnation (it wasn’t sex after all).
There’s more: Aria is in tears because in a different world 100 years ago, Seiya was the Hero she summoned, and he was far less cautious, adopting the catchphrase “Gonna be okay. Something will work out.” The healer of their party was Tiana, a princess from that world…who happens to have the same eyes, face, and voice as Ristarte.
Things wouldn’t work out for Seiya back then, as his party members were eaten one by one by the Demon Lord, whom he’d insufficiently researched. Tiana meets a particularly grisly doom, as it’s revealed she was with child when the Demon Lord ate her.
Finally, Rista learns that she was Tiana, before she was reborn as a goddess. Neither she nor Seiya retained memories of knowing or fighting each other, but fate brought them back together, and Seiya, knowing he was summoned before and failed, became far more cautious, and hence unwilling to let anyone else die this time around.
It’s a lot for Rista to take in, and Toyosaki Aki does as good a job as she can reacting to it all, but this was an awful lot of exposition, rather inelegantly presented in one big plot-bomb. Regardless, the shift from goofy comedy to serious drama was surprisingly effective, and all the information we learned really does enrich what had initially seemed to be more of a skin deep relationship between Rista and Seiya.
Their history, even if there was no overt memory of it, explains not only why Rista and Seiya are a pair again, but why she’s so devoted, attracted, and at times obsessed with him. One could almost call them soul mates. The issue is, she now knows the truth of their past and he doesn’t, and his overarching mission to defeat the Demon Lord and save Gaeabrande overrides all other considerations.
Of course, Rista isn’t going to let Seiya have his way. She insists on joining up with him, and damn the consequences. Ishtar opens a portal for her, and Eruru and Mash announce they’re coming with her out of solidarity—Seiya saved them, after all. Hopefully, things are gonna be okay, and something will work out.